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Function object.hashOf

Calculates the hash value of arg with seed initial value. Result may be non-equals with typeid(T).getHash(&arg) The seed value may be used for hash chaining: 

struct Test
{
    int a;
    string b;
    MyObject c;

    size_t toHash() const @safe pure nothrow
    {
        size_t hash = a.hashOf();
        hash = b.hashOf(hash);
        size_t h1 = c.myMegaHash();
        hash = h1.hashOf(hash); //Mix two hash values
        return hash;
    }
}

Prototype

size_t hashOf(T)(
  T arg,
  size_t seed = 0
);

Authors

Walter Bright, Sean Kelly

License

Boost License 1.0.

Comments